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Ceramic on polyethyline hip - wear is less

Bumpa

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Ceramic femoral heads generated less linear polyethylene cup wear over 20 years
Ihle M. Semin Arthroplasty. 2011 Helio Orthopaedics Today

German researchers concluded after two decades of investigation that ceramic femoral heads create less linear polyethylene cup wear over time compared with metal heads.

While the cobalt-chromium-molybdenum (CoCrMo) group showed a mean 0.190 mm/year wear rate in the long-term study – which examined long-term wear analysis of femoral heads over a 20-year period – the ceramic head group had a 0.107 mm/year wear rate, which caused “significantly less osteolysis and revisions of either component,” the authors wrote in the abstract. The paper was published in Seminars in Arthroscopy

In 80 patients, surgeons performed 93 consecutive uncemented hip arthroplasties using a titanium-coated cup and cementless stem. Eighty ceramic and 13 CoCrMo 32-mm diameter femoral heads were used. On average, patients followed up for 19.3 years and no patient was lost during follow-up, according to the abstract.

CoCrMo revision rates were significantly higher, at 6 revisions over 13 cases, compared to the ceramic group, which had only 11 revisions in 80 cases. The authors noted that wear rate was positively correlated with cup revision, inclination, osteolysis as well as femoral head material and stem osteolysis.
 
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